US4387883A - Changeover device for an installation for recovery of the gases and fumes proceeding from a converter - Google Patents
Changeover device for an installation for recovery of the gases and fumes proceeding from a converter Download PDFInfo
- Publication number
- US4387883A US4387883A US06/311,720 US31172081A US4387883A US 4387883 A US4387883 A US 4387883A US 31172081 A US31172081 A US 31172081A US 4387883 A US4387883 A US 4387883A
- Authority
- US
- United States
- Prior art keywords
- duct
- chamber
- suction
- converter
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the invention relates to a changeover device for an installation for recovery of the gases and fumes proceeding from a tilting converter.
- French Pat. No. 2,366,366 and corresponding U.S. Pat. No. 4,128,230 a device which enables the recovery of the gases and fumes proceeding from a converter which tilts about a horizontal axis, whether this converter is in vertical or inclined position, i.e., during refining of the steel contained in the converter and during charging with melt or with scrap or during pouring of the steel, respectively.
- the recovery installation described in the above mentioned patents includes an enclosure having dimensions sufficient to accommodate the tilting movements of the converter, enveloping the latter about at least that portion of it which is situated above the horizontal plane containing the axis of tilt of the converter.
- the enclosure is equipped with doors to permit charging of the converter, and it is connected to a fixed suction duct situated above the spout of the converter in the vertical position, this duct, or main suction duct, enabling the recovery of the gases escaping into the enclosure when the converter is in its vertical service position.
- a means for regulating the suction enables solely the gases escaping from the converter to be drawn off, to the exclusion of the air which may penetrate into the enclosure.
- the suction regulating means when the converter is in inclined position, the suction regulating means remains in a fixed position, i.e., the position which corresponds in general with maximum suction.
- Certificate of Addition No. 2,402,708 to French No. 2,366,366, also discloses a recovery device which includes, besides the main suction duct connected to the enclosure, a secondary suction duct generally connected to a hood situated outside the enclosure and underneath which the spout of the converter is disposed in inclined position, permitting the recovery of the gases at the time of charging the converter.
- the main duct and the secondary duct are connected to one and the same suction device by way of a changeover device which enables the suction to be exerted either through the main duct or the secondary duct.
- the changeover device At the time of tilting of the converter the changeover device must be manipulated in order to place the secondary suction duct into service.
- the changeover device must therefore be extremely reliable in operation and must enable very good isolation of the secondary suction duct with respect to the main suction duct even in the case of poor operation of the control mechanism for the changeover device.
- the object of the invention is a changeover device for an installation for recovery of the gases and fumes proceeding from a tilting converter, including an enclosure of dimensions sufficient accommodate the tilting movements of the converter, enveloping the latter about at least that portion of it which is situated above the horizontal plane containing the axis of tilt when the converter is vertical, a first fixed suction duct, called the main suction duct, joined to the enclosure and connected to a device enabling a suction to be exerted in the enclosure in which the gases escape from the converter, and a second fixed suction duct called the secondary duct, connected to the same suction device as the main duct by way of the changeover device, the latter having to be extremely reliable in operation and having to enable very good isolation of the main suction duct with respect to the secondary suction duct.
- the changeover device comprises:
- a suction chamber having two superposed portions connected through a vertical junction duct projecting into the upper portion of the chamber, around which is arranged an annular tank containing water, the main duct opening out into the lower portion of the chamber and the secondary duct into the upper portion of the chamber;
- FIG. 1 represents in section through a vertical plane of symmetry a first embodiment of the changeover device.
- FIG. 2 represents in section through a vertical plane of symmetry a second embodiment of the changeover device.
- FIG. 1 shows two ducts 1 and 2 of large diameter, which constitute respectively the main suction duct connected to the hood and to the main recovery flue, arranged above the spout of the converter in the vertical position, and the secondary suction duct connected to the means of recovery of the fumes from the converter in the sloping position for charging, for example, a movable skirt and a recovery hood as described in the French Application for a Certificate of Addition No. 2,402,708.
- the opposite ends of these ducts are connected to the changeover device by way of flanges 3 and 4 in the case of the duct 1, and of a flange 5 in the case of the secondary duct 2.
- the end portion 7 of the duct 1 forms the saturator for the gases, means for introducing water into this portion of the duct enabling them to be saturated with moisture.
- a butterfly valve 8 Arranged between the flanges 3 and 4 is a butterfly valve 8, the closure of which is not entirely gas-tight and which includes in its lower portion a notch for the flow of the water from the saturator towards the expansion chamber 10 into which the duct 1 opens.
- the ducts 1 and 2 slope slightly downwards in the direction of flow of the gases, at the level of their end portions in the vicinity of the changeover device.
- the expansion chamber 10 into which the duct 1 opens forms the lower portion of a chamber of two superposed portions 10 and 11.
- the duct 1 is connected to the upper portion 11 of the chamber.
- each of chambers 10 and 11 includes a lower sloping wall, (14 and 15 respectively) and a pipe stub (16 and 17 respectively) for the water to flow out at their lowest points.
- the upper chamber 11 is connected to the lower expansion chamber 10 by way of vertical supports 18.
- the expansion chamber 10 is in communication with the downstream portion of the circuit for recovery of the gases, by way of a vertical duct 19 which passes through the lower wall of the chamber 10 and includes a portion projecting inside the latter to enable the recovery of the gases in the upper portion of the chamber.
- the duct 19 enables the expansion chamber to be connected to an installation for the removal of dust from the recovered gases.
- the expansion chamber is connected at its upper part to a vertical duct 20 directed upwards and opening out inside the upper secondary recovery chamber 11 in order to recover the gases in the upper portion of the latter.
- the common device for suction of the gases through the main and secondary ducts is located downstream of the dust-removal device and the suction through the secondary duct 2 is effected by way of the ducts 19 and 20 when the device is in the position of secondary recovery shown in FIG. 1.
- annular tank 21 filled with water which forms one of the parts of the means ensuring gas-tightness of the closure of the secondary recovery.
- the other portion of this device for closure and for gas-tightness consists of a bell 22 which, in the secondary recovery position shown in FIG. 1, is inside a housing 23 forming the upper portion of the chamber 11.
- a guide which in the case of FIG. 1 consists of a central column 25 enables the bell to be guided for vertical movement between its high position in the housing 23 and its low position in which the outer sleeve 26 of the bell is immersed in the water filling the annular tank 21.
- the bell likewise includes an inner sleeve 27 enabling the guidance and the placement of the bell inside the duct 20, as shown in dotted lines in FIG. 1.
- the sleeve 27 is closed at its lower end by an end 27b.
- a winch 30 enables the bell to be moved between its high and low positions.
- the chamber 11 is likewise equipped at its upper part with a sprinkler array 31 enabling prewashing of the recovered gases inside the chamber 11.
- the device represented in FIG. 2 differs from the device represented in FIG. 1 in that the lower portion 50 of the chamber of the changeover device consists of one portion of the main duct 41 situated downstream of the butterfly 48.
- the vertical duct 60 putting this lower portion 50 of the chamber into communication with the upper portion 51 is situated as a tap on the duct 41 at the level of its portion 50.
- the secondary duct 42 as previously opens out into the upper portion of the chamber 51.
- the bell 52 movable vertically and guided by the columns 55 is moved by a jack 45 which is substituted for the winch 30 of the device represented in FIG. 1.
- the portion 50 of the duct 41 opens out into the expansion chamber 40 which in turn is in communication with the downstream portion of the recovery circuit comprising the dust-removal device and the common suction device by way of a vertical duct 49.
- a ventilation circuit including pipework 35 and a fan 34 is connected to the upper portion of the housing 23 forming the upper portion of the chamber 11.
- the bell 22 includes a boss 32 on its upper surface, which, when the bell is in the high position as shown in FIG. 1, shuts off the end of the pipe 35 opening into the housing 23.
- the ventilation circuit therefore allows ventilation of the secondary circuit during the main recovery.
- the common suction device arranged downstream of the changeover device is connected to it by way of the ducting 19 which enables a suction to be exerted in the main duct 1, the butterfly 8 being in the open position.
- This position of the bell corresponds with recovery above the convertor in the vertical position.
- a damper then enables the suction to be regulated as a function of the pressure differential between the inside and the outside of the enclosure as described in French Pat. No. 2,366,366 and in U.S. Pat. No. 4,128,230.
- the bell When the converter it tilted into inclined position for receiving the refined steel and for the charging of the scrap, the bell is put into the low position in which it shuts off the communication duct between the two portions of the chamber of the changeover device.
- the butterfly valve 8 or 48 in the main suction duct is moved into closure position by its operating device, which is either pneumatic, hydraulic or mechanical.
- the damper of the suction device is kept in a fixed position during all the operations in which the converter is in inclined position.
- the main advantages of the device according to the invention are to enable extremely simple and extremely reliable manipulation of the changeover member, the rest position of which corresponds with the closure of the secondary portion of the recovery device, and to permit perfectly gas-tight closure of the secondary recovery circuit when the main recovery is in operation.
- the invention is not restricted solely to the embodiments which have been described but includes other relative arrangements of the several components forming the recovery circuit with respect to the changeover device.
- the device according to the invention may be applied to any refining converter including a double system of recovery employable when the converter is in the vertical position and when the converter is in inclined position.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8024741A FR2494719A2 (en) | 1976-07-28 | 1980-11-21 | Fume extn. appts. for converter - includes valve switching chamber so fumes can flow from either prim or sec ducts to dust extn. appts. |
FR8024741 | 1980-11-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4387883A true US4387883A (en) | 1983-06-14 |
Family
ID=9248222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/311,720 Expired - Fee Related US4387883A (en) | 1980-11-21 | 1981-10-15 | Changeover device for an installation for recovery of the gases and fumes proceeding from a converter |
Country Status (4)
Country | Link |
---|---|
US (1) | US4387883A (en) |
BE (1) | BE891172R (en) |
ES (1) | ES8301281A2 (en) |
LU (1) | LU83772A1 (en) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1871943A (en) * | 1930-03-05 | 1932-08-16 | Standard Oil Co | Seal |
US2098553A (en) * | 1935-10-02 | 1937-11-09 | Reiner Otto | Regenerative furnace |
US2253594A (en) * | 1938-11-04 | 1941-08-26 | Bethlehem Steel Corp | Valve |
US2821504A (en) * | 1952-12-06 | 1958-01-28 | Koppers Co Inc | Changeover valves for regenerative ovens |
US3170017A (en) * | 1959-04-21 | 1965-02-16 | Loire Atel Forges | Converter-gas processing system |
US3972708A (en) * | 1973-09-13 | 1976-08-03 | Verfahrenstechnik Dr.-Ing. Kurt Baum | Process for avoiding formation of smoke and flames in bottom blown converters |
US4031819A (en) * | 1976-01-07 | 1977-06-28 | American Air Filter Company, Inc. | Apparatus for collecting and conveying of fumes from a furnace |
US4128320A (en) * | 1975-09-10 | 1978-12-05 | Giuliano Cecchini | Stereoscopic films and viewers therefor |
US4168824A (en) * | 1977-11-02 | 1979-09-25 | Pennsylvania Engineering Corporation | Enclosure for metallurgical vessels |
US4200263A (en) * | 1977-04-22 | 1980-04-29 | Voest-Alpine Aktiengesellschaft | Filling stand arrangement for a metallurgical ladle |
-
1981
- 1981-10-15 US US06/311,720 patent/US4387883A/en not_active Expired - Fee Related
- 1981-11-12 ES ES507062A patent/ES8301281A2/en not_active Expired
- 1981-11-18 BE BE0/206586A patent/BE891172R/en not_active IP Right Cessation
- 1981-11-19 LU LU83772A patent/LU83772A1/en unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1871943A (en) * | 1930-03-05 | 1932-08-16 | Standard Oil Co | Seal |
US2098553A (en) * | 1935-10-02 | 1937-11-09 | Reiner Otto | Regenerative furnace |
US2253594A (en) * | 1938-11-04 | 1941-08-26 | Bethlehem Steel Corp | Valve |
US2821504A (en) * | 1952-12-06 | 1958-01-28 | Koppers Co Inc | Changeover valves for regenerative ovens |
US3170017A (en) * | 1959-04-21 | 1965-02-16 | Loire Atel Forges | Converter-gas processing system |
US3972708A (en) * | 1973-09-13 | 1976-08-03 | Verfahrenstechnik Dr.-Ing. Kurt Baum | Process for avoiding formation of smoke and flames in bottom blown converters |
US4128320A (en) * | 1975-09-10 | 1978-12-05 | Giuliano Cecchini | Stereoscopic films and viewers therefor |
US4031819A (en) * | 1976-01-07 | 1977-06-28 | American Air Filter Company, Inc. | Apparatus for collecting and conveying of fumes from a furnace |
US4200263A (en) * | 1977-04-22 | 1980-04-29 | Voest-Alpine Aktiengesellschaft | Filling stand arrangement for a metallurgical ladle |
US4168824A (en) * | 1977-11-02 | 1979-09-25 | Pennsylvania Engineering Corporation | Enclosure for metallurgical vessels |
Also Published As
Publication number | Publication date |
---|---|
ES507062A0 (en) | 1982-11-16 |
ES8301281A2 (en) | 1982-11-16 |
LU83772A1 (en) | 1982-05-07 |
BE891172R (en) | 1982-05-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3205810A (en) | Adjustable hood construction for metallurgical furnace | |
US3091223A (en) | Sealed vent water heater | |
US3938788A (en) | Apparatus for the production of metals by a smelting metallurgical process | |
US3743264A (en) | Steel conversion apparatus | |
US3448761A (en) | Valve for regulating flow of high-temperature liquids | |
US4387883A (en) | Changeover device for an installation for recovery of the gases and fumes proceeding from a converter | |
US3332676A (en) | Regulation of the collection of gases from the oxygen refining pig iron | |
US3999977A (en) | Method for controlling the injection of flux into a steelmaking vessel as a function of pressure differential | |
US3814402A (en) | Device for collecting gases from a converter | |
GB956275A (en) | Improvements in or relating to ultra high pressure blast furnace | |
US3689047A (en) | Expansible pressure-sealing device | |
US3895785A (en) | Method and apparatus for controlling the operation of a steel refining converter | |
GB1227038A (en) | ||
US4465557A (en) | Gas transferring apparatus in coke oven | |
KR860009137A (en) | Blast furnace filling device for carbonaceous mineral combustion | |
US3570831A (en) | Process and arrangement for evacuation of gas developed during a continuous metal refining operation | |
US3460819A (en) | Gas draft apparatus | |
US4723762A (en) | Apparatus for sealing the skirt of a converter waste gas recovery system | |
US4212453A (en) | Plant for refining pig iron | |
US2177825A (en) | Gas pressure regulator | |
US4673463A (en) | Method for extracting charging gases in coke oven chambers | |
US4256289A (en) | Converter arrangement | |
DK0413100T3 (en) | Closing and regulating means for a metallurgical vessel | |
US3543955A (en) | Blast furnace top | |
JPS5739107A (en) | Operation of blast furnace |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CLESID S.A., 51 RUE SIBERT, 42403 SAINT-CHAMOD FRA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LEVEQUES, MARC;REEL/FRAME:003940/0813 Effective date: 19811005 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M170); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M171); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19950614 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |